JP4654358B2 - Lens drive device - Google Patents

Lens drive device Download PDF

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JP4654358B2
JP4654358B2 JP2005068899A JP2005068899A JP4654358B2 JP 4654358 B2 JP4654358 B2 JP 4654358B2 JP 2005068899 A JP2005068899 A JP 2005068899A JP 2005068899 A JP2005068899 A JP 2005068899A JP 4654358 B2 JP4654358 B2 JP 4654358B2
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spring
carrier
outer cylinder
lens
positioning portion
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JP2006251461A (en
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白木　　学
直樹 関口
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Shicoh Co Ltd
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Shicoh Co Ltd
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Priority to JP2005068899A priority Critical patent/JP4654358B2/en
Priority to CNB2005101161904A priority patent/CN100381850C/en
Priority to KR1020050098376A priority patent/KR100728429B1/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/001—Miniaturised objectives for electronic devices, e.g. portable telephones, webcams, PDAs, small digital cameras
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/025—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using glue
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/026—Mountings, adjusting means, or light-tight connections, for optical elements for lenses using retaining rings or springs
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0069—Driving means for the movement of one or more optical element using electromagnetic actuators, e.g. voice coils

Description

本発明は、レンズ駆動装置に関する。   The present invention relates to a lens driving device.

特許文献１には、略円筒状のヨークと、ヨークが装着される外筒部と、レンズを備えるキャリアと、キャリアを外筒部に対して支持するスプリングと、コイルと、マグネットとを備え、コイルに通電して生じる電磁力によりキャリアをレンズの光軸方向に移動するレンズ駆動装置が開示されている。   Patent Document 1 includes a substantially cylindrical yoke, an outer cylinder portion on which the yoke is mounted, a carrier including a lens, a spring that supports the carrier with respect to the outer cylinder portion, a coil, and a magnet. A lens driving device that moves a carrier in the optical axis direction of a lens by electromagnetic force generated by energizing a coil is disclosed.

特開２００４−２８００３１号公報JP 2004-280031 A

しかし、上述の特許文献１に記載の従来技術では、キャリアを外筒部にスプリングで支持しているだけなので、キャリアに横方向の力が作用すると、キャリアにずれやがたつきが生じてスプリングが変形し、モータの特性が変化するおそれが生じるという問題がある。また、キャリアに横方向の力が作用してキャリアの位置がずれると、キャリアと外筒部との間のクリアランスを一定に保てず、キャリアの外周面と外筒部の内周面との間で摺動摩擦が発生し、キャリアがレンズの光軸方向にスムーズに移動し難いという問題がある。   However, in the prior art described in Patent Document 1 described above, since the carrier is only supported by the spring on the outer cylinder portion, if a lateral force acts on the carrier, the carrier is displaced and rattled, and the spring There is a problem that the motor may be deformed and the characteristics of the motor may change. In addition, when a lateral force is applied to the carrier and the position of the carrier is shifted, the clearance between the carrier and the outer cylindrical portion cannot be kept constant, and the carrier outer peripheral surface and the outer cylindrical portion inner peripheral surface There is a problem that sliding friction occurs between them and the carrier is difficult to move smoothly in the optical axis direction of the lens.

本発明は、キャリアの横方向のずれやがたつきによるスプリングの変形を防止してモータ特性の変化を防止すると共にキャリアがレンズの光軸方向にスムーズに移動できるレンズ駆動装置を得ることを目的とする。   It is an object of the present invention to provide a lens driving device that prevents deformation of a spring due to lateral displacement or rattling of a carrier to prevent a change in motor characteristics and that allows the carrier to move smoothly in the optical axis direction of the lens. And

前記課題を解決するために、請求項１に記載された発明は、略円筒状のヨークと、ヨークが装着される外筒部と、レンズを備えるキャリアと、キャリアを外筒部に対して支持するスプリングと、コイルと、マグネットとを備え、コイルに通電して生じる電磁力によりキャリアをレンズの光軸方向に移動するレンズ駆動装置であって、スプリングは平面視円環状の板ばねであり、キャリア側に取り付けられる内環と、外筒部側に取り付けられる外環とを備え、スプリングの内環には半径方向外方に突設した位置決め部が設けてあり、位置決め部の外側端が外筒部の内周面に対向して位置することによりキャリアと外筒部との間の位置決めを行なうことを特徴とする。 In order to solve the above-mentioned problem, the invention described in claim 1 includes a substantially cylindrical yoke, an outer cylinder part to which the yoke is attached, a carrier having a lens, and a carrier supported to the outer cylinder part. A lens driving device that includes a spring, a coil, and a magnet, and moves the carrier in the optical axis direction of the lens by electromagnetic force generated by energizing the coil, and the spring is a flat plate spring in plan view, An inner ring attached to the carrier side and an outer ring attached to the outer cylinder part side are provided, and a positioning part projecting radially outward is provided on the inner ring of the spring, and an outer end of the positioning part is provided on the outer side. Positioning is performed between the carrier and the outer cylinder part by being positioned opposite to the inner peripheral surface of the cylinder part.

請求項２に記載された発明は、請求項１に記載の発明において、スプリングは内環と外環とを繋ぐ複数の腕部を備え、腕部はスプリングの円環方向に間隔をあけて設けてあり、腕部間に位置決め部を設けたことを特徴とする。 According to a second aspect of the present invention, in the first aspect of the present invention, the spring includes a plurality of arm portions that connect the inner ring and the outer ring, and the arm portions are provided at intervals in the annular direction of the spring. The positioning portion is provided between the arm portions.

請求項１に記載の発明によれば、キャリア又はスプリングの何れか一方にはキャリアと外筒部との間の位置決めを行なう位置決め部が設けられているので、位置決め部によってキャリアの横方向への動きが規制され、キャリアに横方向の力が作用しても、キャリアにずれやがたつきが生じ難い。よって、スプリングの変形を防止でき、モータ特性の変化を防止できる。   According to the first aspect of the present invention, since either one of the carrier and the spring is provided with the positioning portion for positioning between the carrier and the outer cylinder portion, the positioning portion causes the carrier to move in the lateral direction. Even if the movement is restricted and a lateral force is applied to the carrier, the carrier is unlikely to slip or rattle. Therefore, deformation of the spring can be prevented and change in motor characteristics can be prevented.

位置決め部によってキャリアの横方向への動きが規制されているので、キャリアとフレームとの間のクリアランスを一定に保つことができ、キャリアと外筒部の内周面との間で摺動摩擦が発生し難く、キャリアがレンズの光軸方向にスムーズに移動できる。   Since the movement of the carrier in the lateral direction is regulated by the positioning part, the clearance between the carrier and the frame can be kept constant, and sliding friction occurs between the carrier and the inner peripheral surface of the outer cylinder part. The carrier can move smoothly in the direction of the optical axis of the lens.

位置決め部をスプリングの内環に設けてあるので、位置決め部を設ける際に別途部材を用いる必要がなく、省スペース化及び省コスト化を図れる。 Since the positioning portion is provided in the inner ring of the spring, it is not necessary to use a separate member when providing the positioning portion, and space saving and cost saving can be achieved.

請求項２に記載された発明によれば、請求項１に記載の発明と同様の効果を奏するとともに、位置決め部をスプリングの腕部間に設けてあるので、スプリングの空いたスペースを有効に利用することができると共に、スプリングの成型の際には腕部と位置決め部とを同一の金型で成型できるので製造が容易である。 According to the second aspect of the invention, the same effect as that of the first aspect of the invention can be obtained, and the positioning portion is provided between the arm portions of the spring. In addition, when the spring is molded, the arm portion and the positioning portion can be molded with the same mold, so that the manufacture is easy.

以下に、添付図面を参照して、本発明の実施の形態を詳細に説明する。図１は本実施の形態に係るレンズ駆動装置の縦断面図であり、一点鎖線で抜き出して示す（ａ）は前側スプリングと外筒部との関係を示す断面図であり、（ｂ）は後側スプリングと外筒部との関係を示す断面図、図２は図１に示す前側スプリングの平面図、図３は図１に示す後側スプリングの平面図、図４は本実施の形態に係るレンズ駆動装置の分解斜視図である。   Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a lens driving device according to the present embodiment. FIG. 1 (a) is a sectional view showing a relationship between a front spring and an outer cylinder, and (b) is a rear view. FIG. 2 is a plan view of the front spring shown in FIG. 1, FIG. 3 is a plan view of the rear spring shown in FIG. 1, and FIG. 4 is related to the present embodiment. It is a disassembled perspective view of a lens drive device.

本実施形態に係るレンズ駆動装置１は、携帯電話のオートフォーカスカメラに組み込むものであり、略円筒状のヨーク３と、ヨーク３が装着される外筒部（ベース５、フレーム６）と、ヨーク３の内周側に配置されるキャリア７と、キャリア７の外周側に配置されるコイル１０と、キャリア７の前後方向に配置される前側スプリング９及び後側スプリング１１とを備えている。 A lens driving device 1 according to this embodiment is incorporated in an autofocus camera of a mobile phone, and includes a substantially cylindrical yoke 3, an outer cylinder portion (base 5 and frame 6) on which the yoke 3 is mounted, a yoke 3, a carrier 7 disposed on the inner circumferential side of the carrier 3, a coil 10 disposed on the outer circumferential side of the carrier 7, and a front spring 9 and a rear spring 11 disposed in the front-rear direction of the carrier 7.

ヨーク３は、断面が略コ字状であり、コ字内にリング状のマグネット１３が配置されている。マグネット１３はリング状であり、周方向に沿って４つの円弧状のブロックに分かれている。   The yoke 3 has a substantially U-shaped cross section, and a ring-shaped magnet 13 is disposed in the U-shape. The magnet 13 has a ring shape and is divided into four arc-shaped blocks along the circumferential direction.

ベース５は樹脂製であり、略平坦状の基底部５ａと、基底部５ａの四隅に立設して設けたベース側連結部５ｂとを備え、ベース側連結部５ｂの内周面にはヨーク３を圧接固定する突起部５ｃが設けられている。また、ベース側連結部５ｂの外周にはフレーム６の被係合部２９が係合する係合部２４が形成されている。   The base 5 is made of resin, and includes a substantially flat base portion 5a and base side connection portions 5b provided upright at four corners of the base portion 5a. A yoke is provided on the inner peripheral surface of the base side connection portion 5b. A protrusion 5c that presses and fixes 3 is provided. Further, an engaging portion 24 that engages with the engaged portion 29 of the frame 6 is formed on the outer periphery of the base side connecting portion 5b.

フレーム６は樹脂製であり、略平坦状の上壁部６ａと、上壁部６ａの四隅に立設して設けたフレーム側連結部６ｂとを備え、フレーム側連結部６ｂの内周面にはヨーク３を圧接固定する突起部６ｃが設けられている。また、フレーム側連結部６ｂの外周にはベース５の係合部２４に係合される被係合部２９が形成されている。更に、上壁部６ａには円形状の開口部６ｄが形成されており、開口部６ｄの位置にキャリア７に装着されたキャップ１５が位置するようになっている。   The frame 6 is made of resin, and includes a substantially flat upper wall portion 6a and frame side connection portions 6b provided upright at four corners of the upper wall portion 6a, and is provided on the inner peripheral surface of the frame side connection portion 6b. Is provided with a protrusion 6c for pressing and fixing the yoke 3. Further, an engaged portion 29 that is engaged with the engaging portion 24 of the base 5 is formed on the outer periphery of the frame side connecting portion 6b. Furthermore, a circular opening 6d is formed in the upper wall 6a, and a cap 15 attached to the carrier 7 is positioned at the position of the opening 6d.

開口部６ｄの内周面とキャップ１５の外縁１５ａとの間に所定のクリアランスが形成されている。キャリア７が光軸方向に移動する際に、キャップ１５の外縁１５ａがフレーム６の内周面６ｅに接しないようになっている。   A predetermined clearance is formed between the inner peripheral surface of the opening 6 d and the outer edge 15 a of the cap 15. When the carrier 7 moves in the optical axis direction, the outer edge 15 a of the cap 15 is not in contact with the inner peripheral surface 6 e of the frame 6.

前側スプリング９は平面視略円環状の板ばねであり、内環９ａと外環９ｂとが設けられている。内環９ａは円環状を成し、外環９ｂは内環９ａよりも半径の大きな円環状を成し、内環９ａと外環９ｂとの間には両者を繋ぐ複数の腕部９ｃを備えている。腕部９ｃは前側スプリング９の円環方向に間隔をあけて設けており、腕部９ｃ間にスプリング側位置決め部（位置決め部）９ｄを設けている。スプリング側位置決め部９ｄは半径方向外方に突設して設けてあり、スプリング側位置決め部９ｄが突設した分、外環９ｂが半径方向外方に凹んだ形状を成している。尚、スプリング側位置決め部９ｄには略半円状の切欠部９ｆが形成されており、かかる部分に組付け時における回転止め用のピンが差し込まれるようになっている。   The front spring 9 is a substantially annular leaf spring in plan view, and is provided with an inner ring 9a and an outer ring 9b. The inner ring 9a has an annular shape, the outer ring 9b has an annular shape with a radius larger than that of the inner ring 9a, and a plurality of arm portions 9c are provided between the inner ring 9a and the outer ring 9b. ing. The arm portion 9c is provided at an interval in the annular direction of the front spring 9, and a spring side positioning portion (positioning portion) 9d is provided between the arm portions 9c. The spring-side positioning portion 9d is provided so as to project outward in the radial direction, and the outer ring 9b has a shape that is recessed outward in the radial direction by the amount of projection of the spring-side positioning portion 9d. The spring-side positioning portion 9d is formed with a substantially semicircular cutout portion 9f, and a pin for preventing rotation at the time of assembly is inserted into this portion.

前側スプリング９の内環９ａはキャリア７とキャップ１５に挟まれて固定されており、外環９ｂはベース５に固定されたヨーク３とフレーム６との間に挟まれて固定されている。そして、スプリング側位置決め部９ｄの外側端９ｅがフレーム６の内周面６ｅに対向している。尚、外環９ｂとヨーク３との間には前方スペーサ１７が介在されている。   The inner ring 9 a of the front spring 9 is fixed by being sandwiched between the carrier 7 and the cap 15, and the outer ring 9 b is fixed by being sandwiched between the yoke 3 fixed to the base 5 and the frame 6. The outer end 9 e of the spring side positioning portion 9 d faces the inner peripheral surface 6 e of the frame 6. A front spacer 17 is interposed between the outer ring 9 b and the yoke 3.

後側スプリング１１は平面視略円環状の板ばねであり、内環１１ａは円環状を成し、外環１１ｂは内環１１ａよりも半径の大きな円環状を成し、内環１１ａと外環１１ｂとの間には両者を繋ぐ複数の腕部１１ｃを備えている。腕部１１ｃは後側スプリング１１の円環方向に間隔をあけて設けてある。 The rear spring 11 is a plate spring having a substantially circular shape in plan view, the inner ring 11a is formed in an annular shape, the outer ring 11b is formed in an annular shape having a larger radius than the inner ring 11a, and the inner ring 11a and the outer ring are formed. A plurality of arm portions 11c are provided between 11b and 11b. The arm portions 11 c are provided at intervals in the annular direction of the rear spring 11.

内環１１ａはキャリア７の光軸方向後端に固定されており、外環１１ｂはベース５の基底部５ａと後方スペーサ１９との間に挟まれて固定されている。   The inner ring 11 a is fixed to the rear end in the optical axis direction of the carrier 7, and the outer ring 11 b is fixed between the base portion 5 a of the base 5 and the rear spacer 19.

尚、前側スプリング９と後側スプリング１１とは、組み立て前の状態（スプリングに負荷がかかっていない状態）においては、内環９ａ、１１ａと外環９ｂ、１１ｂとが略同一平面上に位置しており、組付け時にはスプリングに予圧がかかって内環９ａ、１１ａと外環９ｂ、１１ｂとの間に段差が生じるようになっている。   The front spring 9 and the rear spring 11 have the inner rings 9a and 11a and the outer rings 9b and 11b located on substantially the same plane in a state before assembly (a state where no load is applied to the springs). At the time of assembly, a preload is applied to the spring so that a step is formed between the inner rings 9a and 11a and the outer rings 9b and 11b.

キャリア７は略円筒形状であり、その内部にレンズ１２が固定されている。また、キャリア７の後端側にはフランジ部２１を備え、フランジ部２１には半径方向外方に突設するキャリア側位置決め部（位置決め部）２３が設けられている。キャリア側位置決め部２３の外側端２３ａが後側スプリング１１の外環１１ｂの内周１１ｄに対向している。   The carrier 7 has a substantially cylindrical shape, and a lens 12 is fixed therein. Further, the rear end side of the carrier 7 is provided with a flange portion 21, and the flange portion 21 is provided with a carrier side positioning portion (positioning portion) 23 protruding outward in the radial direction. The outer end 23 a of the carrier side positioning portion 23 faces the inner periphery 11 d of the outer ring 11 b of the rear spring 11.

次に、本実施の形態に係るレンズ駆動装置の組み立て及び作用効果を説明する。レンズ駆動装置１の組み立ては、キャリア７に後側スプリング１１を取り付け、マグネット１３と、キャリア７に固定したコイル１０とをヨーク３の内部に配置して、ベース５の基底部５ａに後方スペーサ１９を介して組み付ける。そして、前方スペーサ１７とヨーク３との間に前側スプリング９の内環９ａを載置してキャップ１５で固定すると共にフレーム６をベース５に取り付けて、前側スプリング９の外環９ｂをフレーム６で固定する。   Next, assembly and operation effects of the lens driving device according to the present embodiment will be described. The lens driving device 1 is assembled by attaching the rear spring 11 to the carrier 7, placing the magnet 13 and the coil 10 fixed to the carrier 7 inside the yoke 3, and placing the rear spacer 19 on the base portion 5 a of the base 5. Assemble through. The inner ring 9 a of the front spring 9 is placed between the front spacer 17 and the yoke 3 and fixed with the cap 15, the frame 6 is attached to the base 5, and the outer ring 9 b of the front spring 9 is attached to the frame 6. Fix it.

前側スプリング９が組み付けられた状態において、内環９ａのスプリング側位置決め部９ｄの外側端９ｅがフレーム６の内周面６ｅに対向しており、キャリア７の横方向の動きが規制される。また、後側スプリング１１が組み付けられた状態において、キャリア７のキャリア側位置決め部２３の外側端２３ａが外環１１ｂの内周１１ｄに対向しており、キャリア７の横方向の動きが規制される。   In the state where the front spring 9 is assembled, the outer end 9e of the spring side positioning portion 9d of the inner ring 9a faces the inner peripheral surface 6e of the frame 6, and the lateral movement of the carrier 7 is restricted. Further, in the state in which the rear spring 11 is assembled, the outer end 23a of the carrier side positioning portion 23 of the carrier 7 faces the inner periphery 11d of the outer ring 11b, and the lateral movement of the carrier 7 is restricted. .

本実施の形態では、スプリング側位置決め部９ｄの外側端９ｅがフレーム６の内周面６ｅに対向してキャリア７の横方向の動きが規制されるので、キャリア７に横方向の力が作用しても、キャリア７にずれやがたつきが生じ難い。よって、前側スプリング９の腕部９ｃ及び後側スプリング１１の腕部１１ｃの変形を防止でき、モータ特性の変化を防止できる。   In the present embodiment, since the outer end 9e of the spring side positioning portion 9d faces the inner peripheral surface 6e of the frame 6 and the lateral movement of the carrier 7 is restricted, a lateral force acts on the carrier 7. However, the carrier 7 is unlikely to be displaced or rattled. Therefore, deformation of the arm portion 9c of the front spring 9 and the arm portion 11c of the rear spring 11 can be prevented, and a change in motor characteristics can be prevented.

また、キャリア７の横方向の動きが規制されるので、キャリア７とフレーム６との間のクリアランス（図１（ａ）中符号２５で示す部分）、キャリア７とヨーク３との間のクリアランス（図１中符号２７で示す部分）、ヨーク３とコイル１０との間のクリアランス（図１中符号２９で示す部分）、及びマグネット１３とコイル１０との間のクリアランス（図１中符号３１で示す部分）を一定に保つことができ、キャリア７がレンズ１２の光軸方向にスムーズに移動できる。   Further, since the lateral movement of the carrier 7 is restricted, the clearance between the carrier 7 and the frame 6 (the portion indicated by reference numeral 25 in FIG. 1A), the clearance between the carrier 7 and the yoke 3 ( 1), the clearance between the yoke 3 and the coil 10 (the portion indicated by reference numeral 29 in FIG. 1), and the clearance between the magnet 13 and the coil 10 (indicated by reference numeral 31 in FIG. 1). Part) can be kept constant, and the carrier 7 can move smoothly in the optical axis direction of the lens 12.

スプリング側位置決め部９ｄをスプリングの内環９ａに設けてあるので、位置決め部を設ける際に別途部材を用いる必要がなく、省スペース化及び省コスト化を図れる。   Since the spring-side positioning portion 9d is provided in the inner ring 9a of the spring, it is not necessary to use a separate member when providing the positioning portion, and space saving and cost saving can be achieved.

スプリング側位置決め部９ｄをスプリングの腕部９ｃ間に設けてあるので、スプリングの空いたスペースを有効に利用することができると共に、位置決め部９ｄの面積を広くとることで、横方向の衝撃に対して位置決め部９ｄの変形を防止できる。また、スプリングの成型の際には腕部９ｃとスプリング側位置決め部９ｄとを同一の金型で成型できるので製造が容易である。   Since the spring side positioning portion 9d is provided between the arm portions 9c of the spring, it is possible to effectively use the space where the spring is vacant, and by taking a large area of the positioning portion 9d, it is possible to prevent a lateral impact. Thus, deformation of the positioning portion 9d can be prevented. Further, when the spring is molded, the arm portion 9c and the spring side positioning portion 9d can be molded with the same mold, so that the manufacture is easy.

尚、本発明は、前述した実施形態に限定されることなく、その要旨を逸脱しない範囲で種々変形して実施できることは言うまでもない。   Needless to say, the present invention is not limited to the above-described embodiment, and can be variously modified without departing from the scope of the invention.

レンズ駆動装置１は携帯電話に係るカメラに限らず、デジタルカメラに用いるものであっても良い。   The lens driving device 1 is not limited to a camera related to a mobile phone, but may be used for a digital camera.

本実施の形態に係るレンズ駆動装置の縦断面図であり、一点鎖線で抜き出して示す（ａ）は前側スプリングと外筒部との関係を示す断面図であり、（ｂ）は後側スプリングと外筒部との関係を示す断面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a longitudinal cross-sectional view of the lens drive device which concerns on this Embodiment, (a) extracted and shown with a dashed-dotted line is sectional drawing which shows the relationship between a front side spring and an outer cylinder part, (b) is a rear side spring, It is sectional drawing which shows the relationship with an outer cylinder part. 図１に示す前側スプリングの平面図である。It is a top view of the front side spring shown in FIG. 図１に示す後側スプリングの平面図である。It is a top view of the rear side spring shown in FIG. 本実施の形態に係るレンズ駆動装置の分解斜視図である。It is a disassembled perspective view of the lens drive device concerning this embodiment.

１ レンズ駆動装置
３ ヨーク
５ ベース（外筒部）
６ フレーム（外筒部）
７ キャリア
９ 前側スプリング（スプリング）
９ａ 内環
９ｂ 外環
９ｃ 腕部
９ｄ スプリング側位置決め部
１０ コイル
１１ 後側スプリング（スプリング）
１１ａ 内環
１１ｂ 外環
１１ｃ 腕部
１２ レンズ
１３ マグネット
２３ キャリア側位置決め部 1 Lens drive device 3 Yoke 5 Base (outer cylinder)
6 Frame (outer cylinder)
7 Carrier 9 Front spring (spring)
9a Inner ring 9b Outer ring 9c Arm part 9d Spring side positioning part 10 Coil 11 Rear side spring (spring)
11a Inner ring 11b Outer ring 11c Arm part 12 Lens 13 Magnet 23 Carrier side positioning part

Claims (2)

略円筒状のヨークと、ヨークが装着される外筒部と、レンズを備えるキャリアと、キャリアを外筒部に対して支持するスプリングと、コイルと、マグネットとを備え、コイルに通電して生じる電磁力によりキャリアをレンズの光軸方向に移動するレンズ駆動装置であって、スプリングは平面視円環状の板ばねであり、キャリア側に取り付けられる内環と、外筒部側に取り付けられる外環とを備え、スプリングの内環には半径方向外方に突設した位置決め部が設けてあり、位置決め部の外側端が外筒部の内周面に対向して位置することによりキャリアと外筒部との間の位置決めを行なうことを特徴とするレンズ駆動装置。 A substantially cylindrical yoke, an outer cylinder part to which the yoke is mounted, a carrier having a lens, a spring for supporting the carrier with respect to the outer cylinder part, a coil, and a magnet, are generated by energizing the coil. A lens driving device that moves a carrier in the optical axis direction of the lens by electromagnetic force, and the spring is an annular leaf spring in plan view, and includes an inner ring attached to the carrier side and an outer ring attached to the outer cylinder part side. A positioning portion projecting radially outward is provided on the inner ring of the spring, and the outer end of the positioning portion is positioned opposite the inner peripheral surface of the outer cylinder portion, whereby the carrier and the outer cylinder A lens driving device characterized in that positioning with respect to a part is performed. スプリングは内環と外環とを繋ぐ複数の腕部を備え、腕部はスプリングの円環方向に間隔をあけて設けてあり、腕部間に位置決め部を設けたことを特徴とする請求項１に記載のレンズ駆動装置。 The spring includes a plurality of arm portions that connect the inner ring and the outer ring, the arm portions are provided at intervals in the annular direction of the spring, and a positioning portion is provided between the arm portions. 2. The lens driving device according to 1.
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JP2006251461A (en) 2006-09-21

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